Tractor system for motor-vehicles.



A. H. HOA DLEYf TRACTOR SYSTEM FOR MOTOR VEHICLES.

f Patented Apr. 27, 1915.

2 SHEETS-SHEET A. H. HOADLEY. TRACTOR SYSTEM FOR MOTOR VEHICLES.

' APPLICATiON FILED JUNE H, 1914-. 1,137,620.

Patented Apr. 27, 1915.

ZSHEETS-SHEET 2.

Be it known that l, ALFRED H. HOADLEY, citizen of the United States, andresident of city of Providence, in the county of vented certain new anduseful improvements in Tractorsystems for Motor-Vehicles, of which thefoilowing is a specification.

gfhis invention relates to on autcinctic control system for connectingtogether two electric-motors to work in unison, end the object of thisinvention is to provide means whereby the current is broken to bothmotors when one becomes inoperative or the current to one becomesgreater than that to the other. v

tractor systems of the character described in my prior Patent No.1080414? very desirable, if not necessary for safety in banspecificssion of setters recent Provi dence and State of Rhode Island,have in- It is found in she prncfiical operation of fission. 2 2, EH56Application filed June i1, isle. {serial gether to work in unison andwhereby the discontinuance of she action of one motor adversely affectsthe action of the other, but 1 have devised this system to be appliedmore per-ci cularly to remedy a possible defeet in the safe operation ofmy improved tractor mechanism described in. the patent above rei erredto. i this tractor mechanism the electric motors and ii are operaivelymounted on the opposiiie traction wheels 12. The generator 13 is drivenby any suitable means for generating a current for these driving motors,but in the present instance I have shown this generator as being drivenby an internal combustion engine 14 through the main shef: 15. Thecurrent from the generator was originally passed throu h the circuitwires 23 and 25, and contro ler 16 to the motors 1G and 11 by any of theusual sysln the construction of dling the apparatus, so provide meanswhereby if one of the driving electric mo tors becomes disabled themotor on the opposite wheel will simultaneously become inoperative, .forthe reason that by the usual tors would then pass into the one still isystem when the current is out our operation, this excess of currentwould imof one motor the other receives the voltage medlately iump themotor ahead and cause practically of both and imparts to the same thetractor Wheel on which it was mounted such increased energy that itimmediately o n q ickly Out of its normal path of 85 so jumps ahead andthe steering wheel is apt travel, and in some cases render the appato berenched fro th h nd f ch driv r ratus manageable. To obviate this sourceand serious accident result, therefore to ob- 0 ifi lty which in someinstances might 'viate this difficulty I interpose a current proveserious I have interposed into the cirbreaker into .the electric circuitbetween the cuit between the generator and the motors, 93

two motors, which is adapted to be operated c c i b eaker of anysuitable. construcby an unbalancing of the current to the diftlon, W cmay be m the form of a fuse, ferentsmotors, to instantly and eutomati- Ct-o or other suitable device for auto Call break the main i uit, d ut 5th matically breaking the circuit when the ourcurrent to both motors Bythis arrangerent t0 one motor becomes greater than that 9 ment thedanger above described is removed t0 h r mo or.

and the operator may then cut down the n the drawmgs I have here nillustrated speed of his generator and r t a, light one form of circuitbreaker which is that of current to the one remaining motor. a pairoi'mugnets 17 wound to oppose each terns of wires 26 and 27 the samebeing so arranged that if for any reason one of the motors was disabledthe whole force of the current originally distributed to both 1110-Figure 1 is a, sectional side elevation other, each being connected tothe circuit of 1 no showing the general arrangement of mechathG OPPOSItGmotors, whereby when the curnism to which my improved automatic conrentt on m t r 1s r duced beyond the pretrol system is applied to a tractormechedetermined point, the current through these nism. Fig. 2 is adiagrammatic view showtwo oppos ng electromaguets-fails to balance ingthe general wiring diagram and circuit or neutralize each other and thearmature 18 W connections, between the generator and two 1s attractedand drawn downward and motors with the circuit breaking device inthroughthe movement oi the lever 28 trips terposed between the generator andthe the latch 19 end permits the weight 20 to ,motors? v .iiall and theconnecting member 21' by its lefty improved automatic system may "be 11m inherent'sgr'mg one breaks she circuit through t e wire 23st ch point22.

appliedto any power. plans whereby two a Thus will-be the current iscubo- -.oif more electric motors are connecied'ito Fig. 2, whichrestores the controller to normal position. The driver may then starthis generator slowly into action and by the use of the remaining motordrive his vehicle to a garage for inspection and repairs.

I claim:

1. In a tractor system a pair of motors each mounted to operate separatesteerable traction wheels, said motors being connected to work inunison, and means for breaking the current toboth motors when onebecomes inoperative, whereby an excessive driving force is effectually.prevented from being applied to one of said wheels to throw it from itsnormal line of travel.

2. In a tractor system a pair of motors each mounted to operate separatesteerable traction wheels independently and means interposed into theelectric circuit adapted to be operated by an unbalancing of the currentto the different motors to automatically affect the main current andprevent an excessive driving force being applied to one of said wheelsto throw it from its normal line of travel.

3. A motor vehicle comprising traction wheels pivotally journaled uponopposite ends of a relatively stationary axle, an electric generatorcarried by the vehicle for supplying current with which to drive saidInotors and means whereby the current is broken to both motors when thecurrent to said motors becomes unequal, whereby an excessive drivingforce iseifectually prevented from being applied to one of said wheelsto turn the vehicle from its normal line of travel.

4-. A motor vehicle comprising traction wheels pivotally journaled uponopposite ends of a relatively stationary axle, a source of electricenergy carried by the vehicle for supplying current with which to drivesaid motors and means whereby the current is rendered ineffective uponboth motors when the current to both becomes unequal, where by a doubledriving force is prevented from being thrown on one of the steerabletraction wheels to turn the vehicle from its normal line 01' travel.

In testimony whereof I affix my signature in PIL'QSBIICG of twowitnesses.

ALFRED H. HOADLEY.

Witnesses 2 lVM. E. VVHrre, JAS. T. RA'rnnnN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

